the most tweeted about event in u.s. political history. perhaps no surprise there. but almost 328,000 tweets per minute when president obama was projected to win the election. it beat the last record holder by over 20 million. that was in the first presidential debate by president obama and governor romney. and take a look at a tweet that could go down as the most retweeted in history. it was barack obama's simple accounting of history last night. four more years, with a period. that equals 16 characters. by my math, he had 124 characters left. what a picture those three words, telling so much of the story. george? >> josh, thanks very much. >>> let's go to abc's jon karl right now to talk about the house and the senate, also on the ballot last night. republicans are going to stay in control of the house. one of the surprises last night, democrats, firmly in control of the senate. >> reporter: basically, the bottom line here, you have a congress that's more deeply divided than the one we just had. but the senate, this is a story of missed republican opportunities an